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Physics 1986 JAMB Past Questions

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26

A wave of frequency 10Hz forms a stationary wave pattern in a medium where the velocity is 20cms-1. The distance between adjacent nodes is

  • A. 1.0cm
  • B. 1.5cm
  • C. 2.0cm
  • D. 5.0cm
View Answer & Discuss (11) JAMB 1986
27
Which of the following is true of the loudness of sound? It
  • A. depends on the square of the amplitude of the vibrating body
  • B. is proportional to the distance of the observer from the source of the sound
  • C. is greatest in vacuum
  • D. is dependent in vacuum
View Answer & Discuss (2) JAMB 1986
28
A man clapping his hands at regular intervals observes that the echo of a clap coincides with the next clap. If the reflecting cliff is 160m away and the speed of sound is 320ms-1, what is the frequency of the clapping?
  • A. 1 Hz
  • B. 2Hz
  • C. 4Hz
  • D. 8Hz
View Answer & Discuss (4) JAMB 1986
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29
The vibration of an air column produces the sound in the
  • A. piano
  • B. guiter
  • C. flute
  • D. school handbell
View Answer & Discuss (1) JAMB 1986
30
Which of the following is NOT a part of a d.c. electric motor?
  • A. Field-magnet
  • B. Armature
  • C. Commutator
  • D. Transformer
View Answer & Discuss (4) JAMB 1986
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